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  • With a European Norm (EN) lower-limit rating of 20°F, the Furnace 20 is a versatile bag for 3-season backpacking adventures when temps might dip below freezing
  • 550-fill-power ProDown™ natural goose down insulation is light and lofty
  • ProDown™ is enhanced with a hydrophobic finish that improves warmth by allowing it to dry faster and repel moisture up to 10x longer than untreated down
  • Anti-compression pads made from Heatseeker™ Eco synthetic insulation are sewn into high-pressure areas that contact the ground to create an insulating buffer
  • Shaped hood and down-insulated draft collar hold in warmth
  • Insulated draft tube backs the zipper to prevent warm air from escaping; antisnag tape keeps the zipper from catching on the draft tube
  • 3/4-length, 2-way zipper lets you make adjustments for ventilation
  • Comfort-oriented shape has a less-tapered cut than some backpacking sleeping bags, allowing you more room to move around
  • Footbox allows natural foot movement while also eliminating excess lateral space so you stay warm and comfortable all night long
  • The North Face Furnace 20 Sleeping Bag comes with a standard stuff sack


Many sleeping bags are rated for temperature by an independent testing protocol, the European Norm (EN) 13537. Each bag gets two ratings: a Comfort rating and Lower Limit rating. The Comfort rating is the lowest temperature at which the bag will keep the average woman (or "cold sleeper") comfortable, and the Lower Limit rating is the lowest temperature at which the bag will keep an average man (or "warm sleeper") comfortable. Everyone's body and sleep comfort is different, so EN Ratings are merely a guideline to help you compare products.

View all The North Face Men's Sleeping Bags

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Best Use Backpacking
EN Lower Limit 20 degrees Fahrenheit
EN Comfort 34 degrees Fahrenheit
Temperature Rating (F) 20 degrees Fahrenheit
Temperature Rating (C) -7 degrees Celsius
Long Left
2 lbs. 15 oz.
Regular Left
2 lbs. 10 oz.
Shell Unavailable
Zipper Location Left
Insulation Type Down
Water-Resistant Down Yes
Fill 550-fill goose down
Fill Weight
Long Left
27 ounces
Regular Left
22 ounces
Lining Unavailable
Sleeping Bag Shape Mummy
Fits Up To (in.)
Long Left
78 inches
Regular Left
72 inches
Shoulder Girth (in.)
Long Left
65 inches
Regular Left
64 inches
Hip Girth (in.)
Long Left
61 inches
Regular Left
60 inches
Stuff Sack Size 9 x 17 inches
Stuff Sack Volume 20 liters
Compressed Volume 6.6 liters
Gender Unisex
Rated 5 out of 5 by from Big guys can be warm and comfy too! I am 6', 235# with broad shoulders and hips so my choices for mummy bags have been pretty limited and I have always needed to sacrifice comfort for warmth, until now. This bag is AMAZING! The temp rating is spot on. In just boxers, I was comfortable at 20 degrees at 10,000'. I am a side sleeper so I generally have to deal with other bags coming unzipped in the middle of the night. Not with this bag. I was able to roll over several times and stayed zipped in (I bought the Long version which added some extra turning room). The hood is a generous cut as well and had enough room for my backpacking pillow while cinched. I would recommend this bag to anyone my size or side sleepers. I am impressed and I think you will be too.
Date published: 2014-08-22
Rated 5 out of 5 by from Roomy enough I'm 6'0" 210lbs & this bag gives me plenty of room to turn over during the night, but not tons of wasted space. This bag has more hip & shoulder girth than many of the other bags in its comfort zone. You can't go wrong with down. It's very plush & compresses down very nicely (stuff sack not included). Only complaint is that it doesn't come with a bag you can use. The bag it comes in isn't a bag you want to store a down bag in, & it's not compact enough to backpack with. I leave mine stretched out on one of our guest beds & bought a stuff sack (REI brand for less than $20) for when it's time to pack.
Date published: 2016-01-09
Rated 5 out of 5 by from Great Sleeping Bag I bought two of these about a month ago, one for me and another for my son. We are both in Scouting and we were going on a camping trip where we knew the nights were going to dip close to freezing. We needed a good 3 season bag and we went with this one rated to 20 degrees. It worked great. Both of us stayed nice an warm in low 30's weather. The bag is comfortable and the compression is great. I suggest buying the extra compression bag because you can squeeze this bag down to an incredibly small size. I am very pleased with this purchase.
Date published: 2014-11-21
Rated 4 out of 5 by from Good Bag, good price Nice warm bag for those cold nights early and late in the season. I like to be picky in my reviews to help people out. I am a very picky sleeper. I do like all the room in the shoulders so I can roll around. I got the tall because I am 6 foot and it is comfortable. I also got my girlfriend the women's version oppositely handed so they zip together. The only cons I find with it are the zipper and the velcro. The zipper does snag often and the velcro scratches my face once in a while when it is not fully zipped on those warmer nights. It does not pack extremely small but it works. I wish it would come with a mesh bag. You should not store bags in the compression sack. I just bought a pillow case and thats where it spends time in my closet.
Date published: 2015-05-18
Rated 5 out of 5 by from Nice Value For years I have had a really large (heavy) synthetic mummy bag. I got such a bag because a typical mummy bag was just to confining for a side sleeper like myself. I wanted a lighter, warmer, and maybe not quite so large mummy bag that still had room to move around in. I purchased this bag early in the spring online with hopes that it would meet my needs. Upon receiving it, I tried it out just to get an initial feel for the bag and I was pretty happy with the fit. I finally got to try it out at 9K and 10k feet with lows in the 30s and I was not disappointed. I tend to be a cold sleeper but with this bag I needed to unzip this bag partly after warming up in the middle of the night. I was able to ditch both my beanie and wool socks. I am very happy with my purchase and look forward to many more backpacking trips with it.
Date published: 2015-09-08
Rated 5 out of 5 by from Amazing Sleeping Bag I purchased this bag for backpacking the Appalachian Trail and it is exceptional. The quality of the bag is great and the material is very comfortable. I would recommend buying the 0 degree bag if you plan on camping in sub 20 temperatures but I put a liner in this bag and was warm throughout. This bag packs into the bottom of my Gregory savant 58 and is highly compressible with amazing loft. Highly recommended!!!
Date published: 2015-01-16
Rated 5 out of 5 by from Amazing Bag! I took this bag on a week long backpacking trip down into the Canyon and through the Narrows of Zion National Park. My body was not aware of the temperature each night and morning until I was out of my bag. I love it!
Date published: 2014-10-21
Rated 4 out of 5 by from Great bag for what it is The highlight of this bag is the comfort and room. Typically, mummy bags are quite tight against the body and make you feel claustrophobic. This bag is a great intro to mummy bags as this one is more roomy. I just used it on the trail to the kolob arch in ZION. Night time temperatures were around freezing probably somewhere between 34-40 degrees. I slept in my clothes, but I stayed warm through the whole night. I am someone who gets cold very easily and I hate feeling chilly. This bag kept me warm, and the roomy toe box was a nice feature. I would recommend this bag to anyone would wants comfort first, weight second. It's a bit heavy, but I'll accept a few extra ounces if it means better comfort.
Date published: 2016-04-21
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What number zipper (coil width) does this bag have?  Is it compatible with the #8 zipper on my TNF Cat's Meow?

Asked by: ShaggyStyle
The Furnace has a #8 SBS zipper coil. This will not be compatible with a Cat's Meow as it has a #8 YKK zipper.
Answered by: REIservice
Date published: 2017-01-27

What is a good compatible compression bag for this sleeping bag?

Asked by: hobbyman
These compression stuff sacks will work on the Furnace: - 20 liter - 21 liter
Answered by: REIservice
Date published: 2016-12-09

Does the North Face Furnace 20 Sleeping Bag have a partner system that is compatible with? I'm comparing this bag to the REI Radiant Sleeping Bag which is comparable but lists it's being able to zip to another bag.

Asked by: NJSfly
No, REI only carries the Furnace 20 Sleeping Bag with a left hand zipper. The North Face does carry the right hand version. The right hand version sleeping bag can be purchased directly from their web site.
Answered by: REIservice
Date published: 2016-06-06

If I'm 6ft tall, should I order the regular or long?  Will I be crammed into the regular with it's 72" fitting size?

Asked by: twallis
The regular Furnace 20 Sleeping Bag will be a good fit based on the height that you provided.
Answered by: REIservice
Date published: 2016-05-16

Is this left zip bag capable of mating with the same model right zip bag? If not, do you have any recommendations for mummy bags that can zip together

Asked by: pelkey523
Yes, the Furnace 20 will zip together with a right hand zipper Furnace 20. REI does not sell the right hand version. This sleeping bag should also zip together with a right hand zipper The North Face women's sleeping bag.
Answered by: REIservice
Date published: 2016-11-19

Will this fit in a 11L compression sack?

Asked by: Amazonite
The Furnace 20 sleeping bag will fit inside an 11 liter stuff sack. This may require additional effort compared to using the stock 20 liter stuff sack.
Answered by: REIservice
Date published: 2016-12-12

For the Furnace Long and also for the Furnace Regular. What is smallest stuff sack that can be used (not a compression sack)?

Asked by: Acute
The recommended stuff sack size for both the regular and long Furnace 20 sleeping bags is 20 liters.
Answered by: REIservice
Date published: 2016-12-12

The Color/Size tab lists both regular and long sizes as left zips, but the picture shows a right zip sleeping bag.  Which is it?

Asked by: mraulert
The North Face carries these sleeping bags in both right and left side zippers. The photo on their web site shows the right side zipper. REI used this photo. REI does not carry the right side zippers.
Answered by: REIservice
Date published: 2016-08-09
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